Pigtail style collimator for 1030nm with an f=2mm aspheric lens in a 4mm OD housing with 40dB return loss, with a 1 meter long, 0.9mm OD hytrel jacketed, 6/125µm singlemode fiber terminated with a super polished FC/PC connector. The collimated beam diameter will be about 0.4mm at the 1/e^2 level.
